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US5186286A - Electromagnetic brake - Google Patents

Electromagnetic brake Download PDF

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Publication number
US5186286A
US5186286A US07/668,658 US66865891A US5186286A US 5186286 A US5186286 A US 5186286A US 66865891 A US66865891 A US 66865891A US 5186286 A US5186286 A US 5186286A
Authority
US
United States
Prior art keywords
brake
wedge
electromagnet
brake wheel
anchor plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US07/668,658
Other languages
English (en)
Inventor
Teppo Lindberg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kone Corp
Original Assignee
Kone Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kone Corp filed Critical Kone Corp
Assigned to KONE OY reassignment KONE OY ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: LINDBERG, TEPPO
Application granted granted Critical
Publication of US5186286A publication Critical patent/US5186286A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F16D55/24—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with a plurality of axially-movable discs, lamellae, or pads, pressed from one side towards an axially-located member
    • F16D55/26—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with a plurality of axially-movable discs, lamellae, or pads, pressed from one side towards an axially-located member without self-tightening action
    • F16D55/28—Brakes with only one rotating disc
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D59/00—Self-acting brakes, e.g. coming into operation at a predetermined speed
    • F16D59/02—Self-acting brakes, e.g. coming into operation at a predetermined speed spring-loaded and adapted to be released by mechanical, fluid, or electromagnetic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/38—Slack adjusters
    • F16D65/40—Slack adjusters mechanical
    • F16D65/52—Slack adjusters mechanical self-acting in one direction for adjusting excessive play
    • F16D65/54—Slack adjusters mechanical self-acting in one direction for adjusting excessive play by means of direct linear adjustment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F16D2055/0004—Parts or details of disc brakes
    • F16D2055/0058—Fully lined, i.e. braking surface extending over the entire disc circumference
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2121/00—Type of actuator operation force
    • F16D2121/18—Electric or magnetic
    • F16D2121/20—Electric or magnetic using electromagnets
    • F16D2121/22—Electric or magnetic using electromagnets for releasing a normally applied brake

Definitions

  • the present invention relates to an electromagnetic brake which is released by the action of the electromagnet when power is supplied to the electromagnet, and engaged when power supply to the electromagnet is cut off.
  • the working clearance between the electromagnet and the anchor plate tends to increase, due to the wear of the friction surfaces and the brake wheel.
  • An increase in this working clearance leads to a decreased force of attraction between the magnet and the anchor plate, and consequent difficulties in releasing of the brake.
  • Another consequence of this increased working clearance is a decreased brake spring force, which results in reduced braking torque.
  • a large working clearance increases the speed of the anchor plate movement (thus increasing the impact force applied to the friction surfaces) when the brake is being engaged. The result of this is a high initial peak in braking torque which imposes a high stress on the brake and other structures and deteriorates the operating characteristics of the brake.
  • the reliability of the brake suffers due to the higher stress level, and the stresses may become uncontrollable due to insufficient servicing.
  • FI publication 75653 proposes an electromagnetic disc brake in which, when the brake is closed, a constant gap between the electromagnet coil and the anchor plate is maintained by means of a stepless adjusting device.
  • This adjusting device is provided with balls running in groove tracks at that end where the electromagnet frame is located.
  • An alternative adjusting device employs a wedge placed between the frame and the electromagnet coil. The said wedge moves down-wards due to its own weight, thereby adjusting the size of the air gap.
  • An object of the present invention is to provide an electromagnetic brake in which means is provided for improved adjustment of the working clearance.
  • the electromagnetic brake of the invention is characterised as comprising: a brake wheel slidably disposed about an axle of the brake; a friction plate fixedly attached to a frame of the brake; an anchor plate movable in an axial direction of the brake; at least two friction surfaces frictionally engaging said brake wheel during braking, said friction surfaces being fixedly disposed on each of said friction plate and said anchor plate respectively; at least one brake spring for urging said anchor plate toward said brake wheel so as to force said friction surfaces into frictional engagement with said brake wheel; an electromagnet disposed in operative relation to said anchor plate, said electromagnet serving to disengage said friction surfaces from said brake wheel when a current is supplied to said electromagnet; and compensating means for compensating for wear of said friction surfaces and thereby maintain a substantially constant predetermined clearance between said and said anchor plate when said friction surfaces are in frictional engagement with said brake wheel.
  • the compensating means comprises: at least one substantially U-shaped retainer, each of said at least one retainer being slidably mounted on a respective shaft disposed parallel to the axel of the brake, wherein each said retainer comprises a front flange facing toward said brake wheel and a rear flange facing away from said brake wheel, and wherein said front and rear flanges are disposed on opposite sides of said anchor plate; a directional element disposed about each said shaft between said anchor plate and said rear flange of each said retainer, said directional element being adapted to limit the motion of said anchor plate away from said brake wheel to a predetermined amount sufficient to ensure release of the brake; wedge means for moving said electromagnet towards said brake wheel; and spring means for urging said wedge means in a predetermined direction to thereby urge said electromagnet towards said brake wheel.
  • the invention achieves a brake with a substantially constant air gap, which means that a smaller brake magnet can be used. Moreover, the brake permits the presence of a large number of tolerances, and the working clearance can be adjusted by the stopping means, for example, spring loaded pins. The adjustment is even and simple, and remains functional through at least the range of motion required to accommodate wear of the friction surfaces.
  • FIG. 1 is a cross-sectional view of a disc brake according to a first embodiment of the invention
  • FIGS. 1a, 1b and 1c illustrate three alternative embodiments of the present invention illustrated in FIG. 1;
  • FIG. 2 is a cross-sectional view of part of a disc brake according to a second embodiment of the invention.
  • FIG. 1 illustrates an electromagnetic brake which may be employed with an electric motor, for example the hoisting motor of a crane.
  • the magnetic brake comprises an adjustment system for compensating the wear of the friction material.
  • the brake comprises an end shield 1, on which a friction plate 2 is fixedly disposed.
  • An anchor plate 3 is disposed opposite the friction plate.
  • a brake wheel 6 which is adapted to the axle of the motor by means of splines (not shown), which permit the brake wheel 6 to move along the axle.
  • Friction surfaces 4 and 5 are disposed on the friction plate 2 and the anchor plate 3, respectively, and face toward the brake wheel 6.
  • Proximal to the anchor plate 3 is an electromagnet comprising an electromagnet housing 7, which is substantially U-shaped in cross-section, and a winding 8 accommodated therein. Notice that the groove of the electromagnet housing 7 points towards the anchor plate 3.
  • the brake frame comprises a wedge housing 12 attached to the end shield 1 through stud bolts 13 (only one of which is illustrated in FIG. 1). Braking torque is generated by causing the anchor plate 3 to move towards the friction plate 2 so as to force the friction surfaces 4 and 5 into frictional engagement with the brake wheel 6. Movement of the anchor plate 3 is accomplished by means of brake springs 14 which bear against the electromagnet housing 7, which in turn is supported by the wedge housing 12 via a wedge ring 10. The friction plate 2 and the anchor plate 3 are prevented from rotation, under braking torque, by the stud bolts 13. Note that the anchor plate 3 can move axially along the stud bolts 13.
  • the anchor plate 3 is disposed within respective retainers 15, disposed on each of the stud bolts 13, which retainers 15 have a substantially U-shaped cross-section formed by a front flange and a rear flange.
  • Respective retainer springs 16 are disposed about each stud bolt 13 between the friction plate 2 and the front flange of the respective retainer 15, so as to urge the retainers 15, and thus the anchor plate 3, away from the brake wheel 6.
  • Each retainer 15 has a backlash e relative to the anchor plate 3, permitting the anchor plate 3 to move rearwards (to the right in FIG. 1) by an amount equal to the backlash e, until the anchor plate 3 contacts the washers 9.
  • the washer 9 is adapted to be moved axially along the stud bolt 13 by the rear flange of the retainer 15, but locks in position when a rearward force is applied thereto by the anchor plate 3 during opening of the brake.
  • the anchor plate 3 When no current is flowing in the magnet winding 8, the anchor plate 3 is forced by the brake springs 14 towards the friction plate 2, thereby closing the brake. With wear of the friction surfaces 4 and 5, the anchor plate 3 moves progressively further towards the brake wheel 6 (to the left in FIG. 1), carrying the retainer 15 and the washer 9 along with it. As this occurs, the width of the clearance between the electromagnet housing 7 and the anchor plate 3 increases.
  • the anchor plate 3 and electromagnet housing 7 move towards each other at acceleration rates determined by the magnetic, frictional, inertial and spring forces acting on the anchor plate 3 and electromagnet respectively.
  • the force of the retainer springs 16 ensures a maximal acceleration of the anchor plate 3, thereby ensuring that the anchor plate 3 makes contact with and is stopped by the washers 9, prior to the electromagnet contacting the anchor plate 3. This has the result of developing a maximal release clearance between the brake wheel 6 and the anchor plate 3.
  • Adjustment of the working clearance is effected by the washers 9, which only allow the anchor plate 3 to move away from the brake wheel by a predetermined distance (the backlash e of the retainer 15).
  • the anchor moves rapidly and then stops at a position determined by the washers 9, while the electromagnet 7 and 8, being slower, continues to move towards the anchor plate 3. If the friction surfaces are worn, a gap will appear between the electromagnet housing 7 and the wedge housing 12. This gap is filled by rotation of the wedge ring 10, which is turned by the coiled spring 11.
  • Spring-loaded pins 18 are slidably disposed in holes provided in the end of the wedge housing 12.
  • the pins 18 protrude through the end of the wedge housing and are urged by springs (not shown) to frictionally engage the wedge ring 10.
  • the pins 18 prevent the ring 10 from moving during attraction while the electromagnet 7 and 8 is still moving and before the anchor 3 is stopped by the washer 9. This effectively prevents over-compensation caused by the wedge ring 10 immediately filling any gap between the wedge housing 12 and the electromagnet housing 7 when it moves toward the anchor 3. In the extreme, this over-compensation could render the brake inoperative by reducing the working clearance to nil, and thereby preventing the brake from being released.
  • FIG. 2 illustrates a second embodiment of the invention.
  • the disc brake uses a back-wedge adjustment system, in which the anchor plate 3 is pressed against the brake wheel 6 by a brake spring 14 which bears against the electromagnet housing 7 as in the first embodiment described above. Between the electromagnet housing 7 and the back stop 19 is disposed a downward-pointing wedge 20 which is urged into the space between the electromagnet housing 7 and the backstop 19 by a wedge spring 21. As the brake is released, the anchor plate 3 is drawn away from the brake wheel through a distance corresponding to the backlash e of the retainer 15, which is determined by the washer 9.
  • the anchor plate 3 With the wear of the friction material, the anchor plate 3 carries the retainer 15 towards the brake wheel 6. Thus, when the brake is released, the anchor plate 3 stops before hitting the electromagnet housing 7. As a result, the electromagnet housing 7 continues to move towards the brake wheel. This movement of the electromagnet housing 7 causes a gap to appear between the wedge 20 and the electromagnet housing 7. This gap is filled as the wedge 20 is moved by the spring 21.
  • FIG. 1a illustrates an embodiment of the invention in which spring loaded pins 18a are mounted in the wedge ring 10 and protrude towards the wedge ring housing 12.
  • FIG. 1c illustrates an embodiment of the invention in which an O-ring 18c is mounted in the wedge ring 10 and protrudes towards the wedge ring housing 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Braking Arrangements (AREA)
US07/668,658 1990-03-13 1991-03-13 Electromagnetic brake Expired - Lifetime US5186286A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI901248A FI85907C (fi) 1990-03-13 1990-03-13 Elektromagnetisk broms.
FI901248 1990-03-13

Publications (1)

Publication Number Publication Date
US5186286A true US5186286A (en) 1993-02-16

Family

ID=8530056

Family Applications (1)

Application Number Title Priority Date Filing Date
US07/668,658 Expired - Lifetime US5186286A (en) 1990-03-13 1991-03-13 Electromagnetic brake

Country Status (5)

Country Link
US (1) US5186286A (fi)
EP (1) EP0446904B1 (fi)
DE (1) DE69110068T2 (fi)
ES (1) ES2073604T3 (fi)
FI (1) FI85907C (fi)

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5497860A (en) * 1994-08-15 1996-03-12 Venturedyne Limited Electromagnetic brake with improved magnet structure
AU667412B2 (en) * 1993-01-14 1996-03-21 Esselte Dymo N.V. Printing apparatus with cassette
US5531308A (en) * 1994-06-21 1996-07-02 Dana Corporation Wear indicator for an automatically adjusting friction torque device
US5551535A (en) * 1994-03-05 1996-09-03 Flender-Himmelwerk Gmbh Device for ensuring safety by preventing mechanically raised and lowered components from crashing down
US5577578A (en) * 1995-06-26 1996-11-26 Electroid Energy efficient motor brake
US5607025A (en) * 1995-06-05 1997-03-04 Smith International, Inc. Drill bit and cutting structure having enhanced placement and sizing of cutters for improved bit stabilization
US6155386A (en) * 1999-02-01 2000-12-05 Tsubakimoto Chain Co. Spring-actuated electromagnetic brake with noise suppressing device
US6182803B1 (en) * 1999-02-01 2001-02-06 Tsubakimoto Chain Co. Spring-actuated electromagnetic brake with noise suppressing device
US20020100646A1 (en) * 2001-01-31 2002-08-01 Maurice Kevin L. Elevator brake assembly
US6439355B1 (en) 2000-12-18 2002-08-27 The Hilliard Corporation Electromagnetic spring-actuated brake system
US6481542B2 (en) 2001-02-19 2002-11-19 Meritor Heavy Vehicle Systems, Llc. Brake adjuster
US20020185342A1 (en) * 2001-06-07 2002-12-12 Edmund Bausch Braking device that can be released electromagnetically
US20030037998A1 (en) * 2001-04-26 2003-02-27 Bendtsen Randall R. Self-adjusting braking apparatus
US20050011707A1 (en) * 2003-07-08 2005-01-20 Monteurs Leroy-Somer Braking system with safe torque take-up
US20090045020A1 (en) * 2001-09-26 2009-02-19 Richeson William E Magnetic brake assembly
US20100122876A1 (en) * 2008-11-19 2010-05-20 Jianwen Cao Disk brake with an improved structure
US20110155486A1 (en) * 2009-12-24 2011-06-30 Kanzaki Kokyukoki Mfg. Co., Ltd. Electric vehicle
US8261898B2 (en) 2007-07-20 2012-09-11 Wirtgen Gmbh Construction machine, as well as clutch for switching the power flow
JP2014055620A (ja) * 2012-09-12 2014-03-27 Hitachi Ltd 電磁ブレーキおよびそれを備えた乗客コンベア
US20140124720A1 (en) * 2011-03-24 2014-05-08 Shinji Hagihara Hoist equipped with power-off type electromagnetic brake
US20140332172A1 (en) * 2013-05-13 2014-11-13 Chung-Hsien Hsieh Door Curtain Anti-Dropping Device for Electric Rolling Door
US10760631B1 (en) * 2017-09-08 2020-09-01 Ausco Products, Inc. Hydraulic caliper brake assembly for multiple rotor thicknesses, diameters, and axial offsets

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0546218B1 (de) * 1991-12-13 1994-06-22 ABUS Kransysteme GmbH & Co. KG. Elektro-magnetische Bremse mit einer Bremsspule

Citations (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2705058A (en) * 1953-11-30 1955-03-29 Warner Electric Brake & Clutch Magnetic torque producing device
US3095068A (en) * 1960-08-23 1963-06-25 R H Stearns Actuator self-adjusting as to range
US3221854A (en) * 1962-05-14 1965-12-07 Eaton Mfg Co Coupling device for clutch or brake use
US3357528A (en) * 1965-05-21 1967-12-12 Verlinde Sa Electromagnetic disc brake for electric motor
US3391768A (en) * 1966-10-12 1968-07-09 Rex Chainbelt Inc Wear adjustor for friction devices
US3394787A (en) * 1967-05-31 1968-07-30 Stearns Electric Corp Self-adjusting clutch or brake
US3485330A (en) * 1969-02-17 1969-12-23 Stearns Electric Corp Self-adjusting clutch or brake
US3613849A (en) * 1969-04-21 1971-10-19 Lenze Kg Maschf Hans Automatic adjusting device for clutches and brakes
US3613838A (en) * 1969-04-21 1971-10-19 Hans Lanze Kg Maschf Automatic adjusting device for clutches and brakes
US3624767A (en) * 1970-08-05 1971-11-30 Warner Electric Brake & Clutch Self-adjusting clutch or brake
DE2314483A1 (de) * 1973-03-23 1974-10-03 Brinkmann Karl Ernst Elektromagnetisch lueftbare federdruckscheibenbremse
JPS5225980A (en) * 1975-08-21 1977-02-26 Meidensha Electric Mfg Co Ltd Electro-magnetic brake
US4071121A (en) * 1975-12-22 1978-01-31 Inventio Ag Automatic adjustment apparatus for a friction brake
JPS53148650A (en) * 1977-05-30 1978-12-25 Mitsubishi Electric Corp Frictional rotary electromagnetic device
US4142610A (en) * 1977-11-14 1979-03-06 Eaton Corporation Self adjusting hoist brake
US4226307A (en) * 1977-12-12 1980-10-07 Verlinde, Societe Anonyme Apparatus for taking up wear in a brake and brake utilizing this apparatus
FR2605155A1 (fr) * 1986-10-08 1988-04-15 Leroy Somer Moteurs Frein electromagnetique, notamment pour moteur-frein
US4966255A (en) * 1988-11-16 1990-10-30 Reliance Electric Industrial Company Automatic wear compensator for electromagnetic brake

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2164134C3 (de) * 1971-12-23 1979-01-18 Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen Elektromagnetische Federdruckbremse mit selbsttätiger Nachstellvorrichtung
DE2164542C3 (de) * 1971-12-24 1980-04-17 Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen Selbsttätige Nachstellvorrichtung zum Ausgleich des Abriebs der Reibscheibe einer elektromagnetisch lüftbaren Federdruckbremse bzw. -Kupplung
SE361925B (fi) * 1972-04-14 1973-11-19 Asea Ab
FI75653C (fi) * 1986-08-05 1988-07-11 Kone Oy Elektromagnetisk skivbroms.

Patent Citations (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2705058A (en) * 1953-11-30 1955-03-29 Warner Electric Brake & Clutch Magnetic torque producing device
US3095068A (en) * 1960-08-23 1963-06-25 R H Stearns Actuator self-adjusting as to range
US3221854A (en) * 1962-05-14 1965-12-07 Eaton Mfg Co Coupling device for clutch or brake use
US3357528A (en) * 1965-05-21 1967-12-12 Verlinde Sa Electromagnetic disc brake for electric motor
US3391768A (en) * 1966-10-12 1968-07-09 Rex Chainbelt Inc Wear adjustor for friction devices
US3394787A (en) * 1967-05-31 1968-07-30 Stearns Electric Corp Self-adjusting clutch or brake
US3485330A (en) * 1969-02-17 1969-12-23 Stearns Electric Corp Self-adjusting clutch or brake
US3613849A (en) * 1969-04-21 1971-10-19 Lenze Kg Maschf Hans Automatic adjusting device for clutches and brakes
US3613838A (en) * 1969-04-21 1971-10-19 Hans Lanze Kg Maschf Automatic adjusting device for clutches and brakes
US3624767A (en) * 1970-08-05 1971-11-30 Warner Electric Brake & Clutch Self-adjusting clutch or brake
DE2314483A1 (de) * 1973-03-23 1974-10-03 Brinkmann Karl Ernst Elektromagnetisch lueftbare federdruckscheibenbremse
JPS5225980A (en) * 1975-08-21 1977-02-26 Meidensha Electric Mfg Co Ltd Electro-magnetic brake
US4071121A (en) * 1975-12-22 1978-01-31 Inventio Ag Automatic adjustment apparatus for a friction brake
JPS53148650A (en) * 1977-05-30 1978-12-25 Mitsubishi Electric Corp Frictional rotary electromagnetic device
US4142610A (en) * 1977-11-14 1979-03-06 Eaton Corporation Self adjusting hoist brake
US4226307A (en) * 1977-12-12 1980-10-07 Verlinde, Societe Anonyme Apparatus for taking up wear in a brake and brake utilizing this apparatus
FR2605155A1 (fr) * 1986-10-08 1988-04-15 Leroy Somer Moteurs Frein electromagnetique, notamment pour moteur-frein
US4966255A (en) * 1988-11-16 1990-10-30 Reliance Electric Industrial Company Automatic wear compensator for electromagnetic brake

Cited By (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU667412B2 (en) * 1993-01-14 1996-03-21 Esselte Dymo N.V. Printing apparatus with cassette
US5551535A (en) * 1994-03-05 1996-09-03 Flender-Himmelwerk Gmbh Device for ensuring safety by preventing mechanically raised and lowered components from crashing down
US5566804A (en) * 1994-06-21 1996-10-22 Dana Corporation Automatically adjusting friction torque device
US5531308A (en) * 1994-06-21 1996-07-02 Dana Corporation Wear indicator for an automatically adjusting friction torque device
US5564542A (en) * 1994-06-21 1996-10-15 Dana Corporation Automatically adjusting friction torque device with diaphragm spring
US5564541A (en) * 1994-06-21 1996-10-15 Dana Corporation Travel limit for an automatically adjusting friction torque device
US5595275A (en) * 1994-06-21 1997-01-21 Dana Corporation Torsion spring assembly for an automatically adjusting friction torque device
US5595274A (en) * 1994-06-21 1997-01-21 Dana Corporation Automatically adjusting friction torque device with relatively rotating cam rings
US5497860A (en) * 1994-08-15 1996-03-12 Venturedyne Limited Electromagnetic brake with improved magnet structure
US5607025A (en) * 1995-06-05 1997-03-04 Smith International, Inc. Drill bit and cutting structure having enhanced placement and sizing of cutters for improved bit stabilization
US5577578A (en) * 1995-06-26 1996-11-26 Electroid Energy efficient motor brake
US6155386A (en) * 1999-02-01 2000-12-05 Tsubakimoto Chain Co. Spring-actuated electromagnetic brake with noise suppressing device
US6182803B1 (en) * 1999-02-01 2001-02-06 Tsubakimoto Chain Co. Spring-actuated electromagnetic brake with noise suppressing device
US6439355B1 (en) 2000-12-18 2002-08-27 The Hilliard Corporation Electromagnetic spring-actuated brake system
US6675939B2 (en) * 2001-01-31 2004-01-13 Inertia Dynamics, Inc. Elevator brake assembly
US20020100646A1 (en) * 2001-01-31 2002-08-01 Maurice Kevin L. Elevator brake assembly
US6481542B2 (en) 2001-02-19 2002-11-19 Meritor Heavy Vehicle Systems, Llc. Brake adjuster
US20030037998A1 (en) * 2001-04-26 2003-02-27 Bendtsen Randall R. Self-adjusting braking apparatus
US6766886B2 (en) * 2001-04-26 2004-07-27 Caterpillar Inc. Self-adjusting braking apparatus
US20020185342A1 (en) * 2001-06-07 2002-12-12 Edmund Bausch Braking device that can be released electromagnetically
US6802402B2 (en) * 2001-06-07 2004-10-12 Kendrion Binder Magnete Gmbh Braking device that can be released electromagnetically
US8111122B2 (en) 2001-09-26 2012-02-07 Cequent Performance Products, Inc. Magnetic brake assembly
US20090045020A1 (en) * 2001-09-26 2009-02-19 Richeson William E Magnetic brake assembly
US7504920B2 (en) 2001-09-26 2009-03-17 Tekonsha Engineering Company Magnetic brake assembly
US20050011707A1 (en) * 2003-07-08 2005-01-20 Monteurs Leroy-Somer Braking system with safe torque take-up
US7073641B2 (en) * 2003-07-08 2006-07-11 Moteurs Leroy-Somer Braking system with safe torque take-up
US8261898B2 (en) 2007-07-20 2012-09-11 Wirtgen Gmbh Construction machine, as well as clutch for switching the power flow
US20100122876A1 (en) * 2008-11-19 2010-05-20 Jianwen Cao Disk brake with an improved structure
US8210325B2 (en) * 2008-11-19 2012-07-03 Suzhou Torin Drive Equipment Co., Ltd. Disk brake with an improved structure
US20110155486A1 (en) * 2009-12-24 2011-06-30 Kanzaki Kokyukoki Mfg. Co., Ltd. Electric vehicle
US8381853B2 (en) * 2009-12-24 2013-02-26 Kanzaki Kokyukoki Mfg. Co., Ltd. Electric vehicle
US20140124720A1 (en) * 2011-03-24 2014-05-08 Shinji Hagihara Hoist equipped with power-off type electromagnetic brake
US9181071B2 (en) * 2011-03-24 2015-11-10 Kito Corporation Hoist equipped with power-off type electromagnetic brake
JP2014055620A (ja) * 2012-09-12 2014-03-27 Hitachi Ltd 電磁ブレーキおよびそれを備えた乗客コンベア
US20140332172A1 (en) * 2013-05-13 2014-11-13 Chung-Hsien Hsieh Door Curtain Anti-Dropping Device for Electric Rolling Door
US9376864B2 (en) * 2013-05-13 2016-06-28 Chung-Hsien Hsieh Door curtain anti-dropping device for electric rolling door
US10760631B1 (en) * 2017-09-08 2020-09-01 Ausco Products, Inc. Hydraulic caliper brake assembly for multiple rotor thicknesses, diameters, and axial offsets

Also Published As

Publication number Publication date
EP0446904B1 (en) 1995-05-31
DE69110068D1 (de) 1995-07-06
FI85907B (fi) 1992-02-28
FI85907C (fi) 1992-06-10
EP0446904A1 (en) 1991-09-18
ES2073604T3 (es) 1995-08-16
FI901248A (fi) 1991-09-14
DE69110068T2 (de) 1995-10-19
FI901248A0 (fi) 1990-03-13

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